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Lookup NU author(s): Houda Haidar, Dr David RosarioORCiD, Dr Steph CampbellORCiD, Dr Chris HarrisonORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. Polar dust has been discovered in a number of local active galactic nuclei (AGN), with radiation-driven torus models predicting a wind to be its main driver. However, little is known about its characteristics, spatial extent, or connection to the larger scale outflows. We present the first JWST/MIRI study aimed at imaging polar dust by zooming on to the centre of ESO 428-G14, part of the Galaxy Activity, Torus, and Outflow Survey (GATOS) survey of local AGN. We detect extended mid-infrared (MIR) emission within 200 pc from the nucleus. This polar structure is co-linear with a radio jet and lies perpendicular to a molecular gas lane that feeds and obscures the nucleus. Its morphology bears a striking resemblance to that of gas ionized by the AGN in the narrow-line region. We demonstrate that part of this spatial correspondence is due to contamination within the JWST filter bands from strong emission lines. Correcting for the contamination, we find the morphology of the dust continuum to be more compact, though still clearly extended out to. We estimate the emitting dust has a temperature of. Using simple models, we find that the heating of small dust grains by the radiation from the central AGN and/or radiative jet-induced shocks is responsible for the extended MIR emission. Radiation-driven dusty winds from the torus is unlikely to be important. This has important implications for scales to which AGN winds can carry dust and dense gas out into their host galaxies.
Author(s): Haidar H, Rosario DJ, Alonso-Herrero A, Pereira-Santaella M, Garcia-Bernete I, Campbell S, Honig SF, Ramos Almeida C, Hicks E, Delaney D, Davies R, Ricci C, Harrison CM, Leist M, Lopez-Rodriguez E, Garcia-Burillo S, Zhang L, Packham C, Gandhi P, Audibert A, Bellocchi E, Boorman P, Bunker A, Combes F, Diaz Santos T, Donnan FR, Gonzalez Martin O, Hermosa Munoz L, Charidis M, Labiano A, Levenson NA, May D, Rigopoulou D, Rodriguez Ardila A, Shimizu TT, Stalevski M, Ward M
Publication type: Article
Publication status: Published
Journal: Monthly Notices of the Royal Astronomical Society
Year: 2024
Volume: 532
Issue: 4
Pages: 4645-4660
Online publication date: 06/08/2024
Acceptance date: 24/06/2024
Date deposited: 14/08/2024
ISSN (print): 0035-8711
ISSN (electronic): 1365-2966
Publisher: Oxford University Press
URL: https://doi.org/10.1093/mnras/stae1596
DOI: 10.1093/mnras/stae1596
Data Access Statement: All data used in this paper can be extracted as described in Sections 2 and 3. The reduced JWST/MIRI images are available online on Zenodo under the Creative Commons Attribution 4.0 International license, DOI: 10.5281/zenodo.11491161.
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